E - Fixed Constructions – 02 – B
Patent
E - Fixed Constructions
02
B
61/8
E02B 17/04 (2006.01) E02B 17/02 (2006.01) E02D 29/06 (1980.01)
Patent
CA 1042673
ABSTRACT OF THE DISCLOSURE The installation and recovery of a structure or tem- plate which forms a tubular support structure for subsea equip- ment used in drilling and producing offshore oil and/or gas wells. The template contains production manifolding, remote and safety shut-in control, pump-separator, and pipeline connector subsystems. Certain of the structural tubes are segregated to form compartmented ballast chambers capable of being selectively flooded and dewatered. Certain other structural tubes form piling sleeves. The truss or framework of structural tubes include vertical and horizontal tubes, the latter forming circum- ferential members as well as interstitial supports. The upper- most of the circumferential members or "ring" also functions as a fender to protect the equipment within the template. The template is made negatively buoyant upon launch by flooding the compartmented ballast chambers, keelhauled (swung to a position underneath the keel of the drilling vessel), and then lowered to the subsea floor. Once it is positioned on the sea floor the subsea structure is oriented, pile founded and leveled. The template functions as a drilling and casing guide frame ensuring that drilled wells are connectable to the preinstalled manifold- ing. The template is recoverable by severing the piles and deballasting the compartmented ballast chambers.
287506
Burkhardt Joseph A.
Loth William D.
Pattison Martin O.
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